Comparison

Kalculator vs Calculator Smart

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Kalculator

This app offers a modern calculator experience, bridging the gap between basic phone calculators and complex scientific tools. It allows for complex calculations and stores operation history, functioning like a mobile numeric spreadsheet. It syncs seamlessly across Apple devices.

Highlights
  • Complex calculation support
  • Operation history storage
  • Numeric spreadsheet functionality
  • Cross-device syncing (iPhone, iPad, Apple Watch)
  • Modern interface
Features
Read full description

Have you noticed that your phone’s calculator isn’t any better than the ones from back in the 80s? Do you find yourself using Google or Excel to calculate something like this: (80*200)/29+56 ? Then, Kalculator is definitely for you. Kalculator makes you fast on your feet with numbers no matter where you are. Face it, you always find yourself needing to find the middle ground between a scientific graphing calculator and the one you threw away 10 years ago. Kalculator is that sweet spot. Kalculator can store your operations history and resolve complex calculations. It’s like a single cloumn numeric spreadsheet on your phone. It works seamlessly in your iPhone, iPad and Apple Watch and helps keep everything in sync.

About

Calculator Smart

This app offers a powerful and precise calculator for everyday math and advanced scientific computations. It features a clean interface with large buttons, supporting complex equations, multiple modes, and intuitive input methods. Personalize your experience with colorful skins and custom icons.

Highlights
  • 30+ scientific operations
  • Degrees and Radians support
  • Parentheses and nested equations
  • Intuitive input with slide-to-delete
  • Copy & Paste results
  • Apple Watch app and Lock Screen Widget
  • Colorful skins and custom icons
Features
Read full description

Calculator Smart is the most powerful and precise calculator for iPhone, iPad, and Apple Watch — built for everyday math and advanced scientific computations alike. Whether you need a quick percentage or a complex nested equation with parentheses, Calculator Smart handles it all with a clean, modern interface and lightning-fast big buttons. Scientific & Standard Modes • 30+ scientific operations including trigonometry, logarithms, and more • Degrees and Radians support • Parentheses and nested parentheses for complex equations • Output in Decimal or Scientific Notation (mantissa/exponent) Intuitive Input • Slide to delete wrong digits instantly • Double-tap or long-press to Copy & Paste results • Full External Keyboard support (Bluetooth & Smart Keyboard) • Three-digit grouping with locale-specific decimal and thousands separators Cross-Platform & Widgets • Apple Watch app with Complication shortcuts • Lock Screen Widget — calculate without unlocking your device • Messages Extension — share results directly in conversations • Multitasking: Slide Over and Split View (iPad) Personalization • Colorful skins to match your style • Custom App Icons that match your chosen skin • Button sound feedback for a satisfying tactile feel Universal Purchase — buy once, use on all your Apple devices. Download Calculator Smart for FREE today!

Screenshots

Kalculator4 screens
Calculator Smart4 screens

Verdict

The call

The clearest difference is rating: Calculator Smart at 4.7 against Kalculator's 4.2. Calculator Smart also leads on ratings volume (498 vs 19). Kalculator's advantage is ads (none vs shown) and monetization model (free vs free with in-app purchases). On price, review sentiment, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kalculator sells 7 one-off in-app purchases and Calculator Smart sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Calculator Smart holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Calculator Smart has 498 ratings behind it against 19, so its average is the more settled of the two. Written reviews complicate that: 38% of Kalculator's written reviews are positive against 36% of Calculator Smart's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Kalculator ships an update every 6 weeks, Calculator Smart every 4 months. The most recent releases landed on November 1, 2026 and October 23, 2026 respectively.

Scorecard6 real differences · 4 level
Kalculator versus Calculator Smart: the parameters behind the verdict, then further details
ParameterKalculatorCalculator Smart
PriceFreeFree
Rating4.2 (19 ratings)4.7 (498 ratings) — better
Positive reviews38.5% of reviews — better36.4% of reviews
Number of ratings19498 — better
Update frequencyEvery 6 weeks — betterEvery 4 months
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple TV, Apple WatchiPhone, iPad, iPod, Mac, Apple TV, Apple Watch — better
Requires iOS11.0 — better13.0
Further details — not scored
Size41 MB24 MB
Age rating4+4+
DeveloperKoombea, Inc.Miroslav Otsedarski

Customer experience

Kalculator

All ratings19 ratings
Positive73.7%
Neutral5.3%
Negative21.1%
Written reviews13 reviews
Positive38.5%
Neutral7.7%
Negative53.8%

Calculator Smart

All ratings494 ratings
Positive93.1%
Neutral1.2%
Negative5.7%
Written reviews22 reviews
Positive36.4%
Neutral27.3%
Negative36.4%

In-app purchases

7 purchases

Kalculator

One-time7
  • Old School Theme Pack$0.99
  • Dark Theme Pack$0.99
  • Pastel Theme Pack$0.99
Show 4 more
  • Vibrant Theme Pack$0.99
  • Classic Theme Pack$0.99
  • Light Theme Pack$0.99
  • Seasons Theme Pack$0.99
3 purchases

Calculator Smart

One-time3
  • Colorful Skins and Remove Ads$1.99
  • Colorful Skins$1.99
  • Colorful Skins for Mac app$1.99

Questions

Is Kalculator free?
Kalculator is free to download, with in-app purchases available.
Is Calculator Smart free?
Calculator Smart is free to download, with in-app purchases available.
Which has better reviews, Kalculator or Calculator Smart?
Calculator Smart is rated higher. Kalculator averages 4.2 out of 5 from 19 ratings, while Calculator Smart averages 4.7 from 498 ratings.
Do Kalculator or Calculator Smart have ads?
Calculator Smart shows ads; Kalculator does not.
Which is updated more often, Kalculator or Calculator Smart?
Kalculator ships an update every 6 weeks, and Calculator Smart every 4 months. Most recently, Kalculator was updated on November 1, 2026 and Calculator Smart on October 23, 2026.

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